Renewable Energy 2012

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Transcript of Renewable Energy 2012

Renewable energy sources in the U.S. Geothermal Water Wind In the first half of 2012 the U.S produced from 2896 Megawatts to 49,802 Megawatts at half way through the year. Imagine what the U.S could produce in a whole year. Wind Energy is made by 3 aerials spinning making kinetic energy which is sent into a motor that has a spinning shaft that moves magnets inside the shaft. When the magnets move the magnetic field around the magnet also moves pushing electrons along copper wire. The electricity is sent to power grids which is then sent to houses when electricity is required.11 4% of the USA is now powered by wind energy and the goal is to power 20% of the US by 2030. The U.S now has more than 2000 hydroelectric power plants which supplies 60% of its renewable electricity. Hydroelectricity is the largest renewable energy producer in the US. In 2010 hydroelectricity powered 6.2% of the nations power. There are hydro power plants in at least 34 states some of the biggest hydro power plants are Hoover Dam, Grand Coulee Dam and Tennessee Valley Authority In 2008 the U.S produced 58% of all renewable energy in the U.S and in that year they also produced a total of 250 terra watts. Water energy is renewable because in most hydro power plants water is pumped back up into a dam to be used the next day. Water energy is similar to the wind turbines except water is pushing the turbine. The U.S average about 15 billion kilowatt hours a year which is the same as 25 million barrels of oil or 6 million tons of coal. In 2010 the U.S was on top of the world in geothermal electricity production, producing 15.6 terra watts. Geothermal energy is renewable. Geothermal is a renewable energy because lava and heat is produced in the earths core everyday (cc) image by nuonsolarteam on Flickr Bibliography http://en.wikipedia.org/wiki/Wind_power_in_the_United_States http://www1.eere.energy.gov/wind/wind_how.html The US (United States) in located in the centre of North America. The population in the US is currently 311 million and in distance is exactly 12,049 kilometres away from Australia. The US is the 4th largest country in world and is the biggest country in the southern hemisphere. It is also the 10th largest renewable energy producer in the world. Wind Water http://en.wikipedia.org/wiki/Hydroelectric_power_in_the_United_States http://en.wikipedia.org/wiki/Hydroelectricity Geothermal http://en.wikipedia.org/wiki/Geothermal_energy_in_the_United_States Geothermal energy works similar to coal except they dig two holes into the earths crust. At the bottom of the two holes there is a pit with lava in it, cold water is pumped into the first hole and collides with lava creating a spray of steam which sprays up the second hole like a geyser, this water/steam pushes a turbine and the steam is directed into the 1st hole again. The Turbine has a pole which spins with magnets in the end. Like the other turbines when the magnet moves so does the magnetic field pushing the electrons along the coil of copper wire. Thanks For Watching! Other There are a lot of other types of renewable energy being used in the USA such as biomass, and solar. The three biggest types of renewable energy are geothermal, wind and water. Inside a wind turbine Inside a hydro power plant inside a geothermal power plant Why do countries such as Australia still rely on coal? Coal is still relied on a lot in Australia because Australia is the worlds biggest coal miner and exporter. 85% of Australia still uses electricity from coal. In 2008 to 2009 487 million tonnes of coal was mined and 261 tonnes was exported. Pictures from google images http://en.wikipedia.org/wiki/Coal_in_Australia Coal Info US Brazos wind ranch in Texas Once power has been produced it is usually then sent along power lines until its reaches neighbourhoods and is then sent through a transformer to change the Voltage ( The measurement of the of electricity). Transformers change the level of voltage going passing through power lines, power stations etc. After generating electricity it is sent along the lines at 7200 volts and sending 7200 volts into your T.v would blow it up. A transformer takes in a High voltage of electricity and lets it run through a heap coils wrapped around iron in the middle of the transformer. Since the current is alternating, the magnetic field in the middle is also alternating.